drm/amd/display: Block 6Ghz timing if SBIOS set HDMI_6G_en to 0

Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/bios/bios_parser.c

@@ -1853,6 +1853,7 @@ static enum bp_result bios_parser_get_encoder_cap_info(
 
 	info->DP_HBR2_EN = record->usHBR2En;
 	info->DP_HBR3_EN = record->usHBR3En;
+	info->HDMI_6GB_EN = record->usHDMI6GEn;
 	return BP_RESULT_OK;
 }
 

drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c

@@ -887,6 +887,9 @@ static bool dce110_link_encoder_validate_hdmi_output(
 			crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
 		return false;
 
+	if (!enc110->base.features.flags.bits.HDMI_6GB_EN &&
+		adjusted_pix_clk_khz >= 300000)
+		return false;
 	return true;
 }
 
@@ -1008,6 +1011,7 @@ bool dce110_link_encoder_construct(
 				bp_cap_info.DP_HBR2_EN;
 		enc110->base.features.flags.bits.IS_HBR3_CAPABLE =
 				bp_cap_info.DP_HBR3_EN;
+		enc110->base.features.flags.bits.HDMI_6GB_EN = bp_cap_info.HDMI_6GB_EN;
 	}
 
 	return true;

drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h

@@ -37,6 +37,7 @@ struct encoder_feature_support {
 			uint32_t IS_TPS3_CAPABLE:1;
 			uint32_t IS_TPS4_CAPABLE:1;
 			uint32_t IS_YCBCR_CAPABLE:1;
+			uint32_t HDMI_6GB_EN:1;
 		} bits;
 		uint32_t raw;
 	} flags;